Debug NPM Script hangs

[f8k8]

Type: Bug

Reproduction available at: https://github.com/f8k8/VSCodeNPXBug

When running the project linked above using Debug NPM script, the first call to execSync doesn't seem to clean up properly and the second call hangs and is unable to be debugged. This only happens when the script is run from within VS Code. Running the script from the command prompt completes correctly.

Steps to reproduce:

1. Run npm i to install dependencies
2. From a command prompt, run npm run run. The script will complete correctly.
3. Open the project in VS Code.
4. Open the command pallette, and run Debug: Debug NPM script.

Expected results:

When running in VS Code, both calls to execSync should complete correctly.

Actual results:

The first call to execSync returns after completion, but there is still another process, displayed as Node.js Process 2 in the Call Stack window. This process doesn't have any debug controls. The only option is to disconnect. The second call to execSync is then attempted but doesn't seem to do anything. In the terminal, done format is printed and then there is no more displayed. If you press CTRL-C in the terminal window, the Process 2 process ends, but the main process is still active, even though you are returned to the command prompt.

VS Code version: Code 1.90.2 (5437499, 2024-06-18T22:34:26.404Z)
OS version: Windows_NT x64 10.0.19045
Modes:

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz (8 x 4200)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	undefined
Memory (System)	15.93GB (6.68GB free)
Process Argv	--crash-reporter-id 2825093d-42ce-4844-9043-fb109aceb08c
Screen Reader	no
VM	0%

Extensions (4)

Extension	Author (truncated)	Version
vscode-eslint	dba	3.0.10
prettier-vscode	esb	10.4.0
vscode-react-native	msj	1.13.0
prisma	Pri	5.16.1

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vspor879:30202332
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vscoreces:30445986
vscod805:30301674
binariesv615:30325510
vsaa593cf:30376535
py29gd2263:31024239
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azure-dev_surveyone:30548225
2i9eh265:30646982
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pythongtdpath:30769146
welcomedialog:30910333
pythonnoceb:30805159
asynctok:30898717
pythonregdiag2:30936856
pythonmypyd1:30879173
2e7ec940:31000449
pythontbext0:30879054
accentitlementsc:30995553
dsvsc016:30899300
dsvsc017:30899301
dsvsc018:30899302
cppperfnew:31000557
dsvsc020:30976470
pythonait:31006305
jchc7451:31067544
chatpanelc:31048052
dsvsc021:30996838
bdiig495:31013172
pythoncenvpt:31062603
a69g1124:31058053
dvdeprecation:31068756
dwnewjupyter:31046869
legacy_priority:31082724

[connor4312]

Thanks for the good repro